Wheel for vehicles.



No. 628,755. Patented July II, I899.

H. CAMPKIN.

WHEEL FOR VEHICLES.

(Application filed Feb. 14, 1898.)

(No Model.)

lUNirnn rates HARRY OAMPKIN, OF NOTTINGHAM, ENGLAND,

WHEEL FOR VEHICLES.

SPECIFICATION forming part of Letters Patent N0. 628,? 55, dated July 1 1, 1899.

Application filed February 14, 1898. Serial No..670,264. N0 model.

To all whom it may concern.-

Beit known that I, HARRY CAMPKIN, a subject of the Queen of England, residingat Nottingham, England, have invented certain new and useful Improvements in Spring or Pneumatic or Combined Spring and Pneumatic Wheels for Vehicles; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to improvements in or applicable to spring or pneumatic or combined spring and pneumatic wheels for cycles, motor-cars, carriages,and other road-vehicles in which the outer part of the wheel is capable of moving into an eccentric position relatively to the inner part against the action of apnenmatic chamber or springs, or both; and it relates more particularly to means for maintaining the outer part of the wheel parallel to its plane of rotation and communicating thedriving power from the hub to this outer movable part of the wheel.

In the accompanying drawings, Figure 1 is a side elevation, and Fig. 2 a vertical crosssection, showing the middle part of a wheel constructed according to my invention.

According to this invention in a pnuematic wheel the hub A, which is mounted on an axle A in the usual manner, is formed with an annular seat A, on which is mounted a fiexible annular air-chamber B. This airchamber may be formed of india 1' rubber strengthened with canvas or other material and may be provided with an in tlation-valve of any well-known form or be inflated in the manner hereinafter described.

In the drawings the hub A is shown divided in the middle in order that. the air-chamber B maybe placed in' position; but if the 'seatouter rim of the wheel (which is not shown in construction, and I will now proceed to de scribe those parts which comprise the main feature of my invention.

On each side of the hub A are three or any other convenient number of radial arms D. These arms D may be secured to or formed integrally with the hub and are so distributed that those on one side alternate with those on the other side, as shown. Pivoted in the outer end D of each radial arm on an axis at right angles to the plane of rotation of the wheel is a bracket E, provided with guideways E E in which latter is mounted a pin F. These pins F can slide longitudinally in their respective guideways E E The inner ends of these pins F are pivoted to the rim 0 at F, also on an axis at right angles to the plane ofrotation 0f the wheel. When the rim (land the outer part of the Wheel are moved into an eccentric position relatively to the hub A, the pins F will either slide in the guide ways E E of the bracketsE or said brackets E and pins F will oscillate about their respective pivots D F, orboth movements may occur in one set, according to the position they for the time occupy relatively to the eccentricity of the rim 0 and outer part of the wheel with the hub A. The arrangement will thus offer no resistance tothe outer part of the wheel moving into an eccentric position relatively to the hub, but will, however, hold or maintain the outer part of the wheel rigidly parallel to its plane ofrotation.

The arrangement described may be assisted by a duplicate arrangement in which the several parts are placed in the reverseposition,

as shown.

Pivoted to the rim 0, opposite to each of the radial arms D of the arrangement previously 95 brackets H secured thereto. This arrangement worksin precisely the same manner as the arrangement previously described.

The arrangement described has in some cases to perform another office-that is, courmunicate the driving power from the hub to the outer part of the wheel.

In order to prevent undue oscillation of the pivoted brackets E and G owing to the driving power being communicated from the hub A to the rim and outer part of the wheel through the pins F H and said brackets or from other causes, the inner guideways E G2 on each bracket are placed nearer to their respective pivots D F than the outer guideways E G, and: it will thus be seen that when the brackets oscillate the inner guideways G will move through a shorter radius than the outer guidewaysE G, and the resistance to further movements will thus be gradually increased up to a certain point, beyond which they will not move.

I11 order to assist the pneumatic air-chamher A, springs I. may be placed onthe pins F between the brackets E and the outer ends of saidpins, By employing springs I of sufficient strength the pneumatic chamber 13 may be dispensed with and the whole of the resiliency obtained from the said springs, thus constituting it a spring-wheel.

In order to automatically inflate or maintain the air in the air-chamber B at a constant press ure,, one or more pumps may be employed and be disposed as follows: .The barrel Jof each pump (see Fig. 1) is secured to the rim 0, and said barrel is connected to the interior of the air-chamber by a pipe provided with a non-return valve. The piston K is connected by a link K to a rigid stay or bar L, extending from one radial arm D to the next armD on the opposite side of the hub.

Ifclaim 1. In a spring or pneumatic wheel for vehicles, the combination with the hub and the outer part of the wheel, of a radial arm on the hub, a bracket provided with guideways pivoted in the end of the radial arm, and a pin pivoted to the outer part of the-wheel and Working in the guideways in the pivoted bracket, substantially as described.

2. In a spring or pneumatic Wheel for ve= hicles, the combination with the hub and the outer part of the wheel, of a radial arm on the hub, a bracket provided with guideways pivoted in the end of the radial arm, a pin pivoted to the outer part of the Wheel and working in the guideways in the pivoted bracket, and a spring on the said pin, substantially as described.

In a spring or pneumatic wheel for ve hicles, the-combination with the hub and outer part of the wheel, of a bracket provided with guideways pivoted to the outer part of the Wheel, and a pin pivoted to the hub and working in the guideways in the pivoted bracket, substantially as described.

it. In a spring or pneumatic wheel for vehicles, the combination with the huband outer. partof the wheel, ofa radial arm on the hub, a bracket provided with guideways pivoted to the radial arm, a pin pivoted to the rim and working in the guideways in thepivoted bracket, a bracketv provided with guideways pivoted to the outer part ofthe wheel, and a pin pivoted to the hub and working in guideways in the pivoted bracket, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

nARRY CAMPKIN. Witnesses:

H. O. SHELDON, J. W. THORMAN. 

